package com.sdau.reggie.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.sdau.reggie.common.R;
import com.sdau.reggie.dto.DishDto;
import com.sdau.reggie.entity.Category;
import com.sdau.reggie.entity.Dish;
import com.sdau.reggie.entity.DishFlavor;
import com.sdau.reggie.service.CategoryService;
import com.sdau.reggie.service.DishFlavorService;
import com.sdau.reggie.service.DishService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.*;

import java.util.List;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

/**
 * 菜品管理
 */
@RestController
@RequestMapping("/dish")
@Slf4j
public class DishController {

    @Autowired
    private DishService dishService;

    @Autowired
    private DishFlavorService dishFlavorService;

    @Autowired
    private CategoryService categoryService;

    @Autowired
    private RedisTemplate redisTemplate;


    /**
     * 新增菜品
     *
     * @param dishDto
     * @return
     */
    @PostMapping      //如果传过来的数据是JSON，需要加requestBody注解
    public R<String> save(@RequestBody DishDto dishDto) {
        log.info(dishDto.toString());

        dishService.saveWithFlavor(dishDto);

        //清理某个分类下面菜品的缓存数据
        String key = "dish_" + dishDto.getCategoryId() + "_1";
        redisTemplate.delete(key);


        return R.success("新增菜品成功");
    }

    /**
     * 菜品信息分页查询
     *
     * @param page
     * @param pageSize
     * @param name
     * @return
     */
    @GetMapping("/page")
    public R<Page> page(int page, int pageSize, String name) {
        //构造分页构造器对象
        Page<Dish> pageInfo = new Page<>(page, pageSize);
        Page<DishDto> dishDtoPage = new Page<>();

        //条件构造器
        LambdaQueryWrapper<Dish> lqw = new LambdaQueryWrapper<>();
        //添加过滤条件----模糊查询
        lqw.like(name != null, Dish::getName, name);
        //添加排序条件
        lqw.orderByDesc(Dish::getUpdateTime);

        //执行分页查询
        dishService.page(pageInfo, lqw);

        //对象拷贝------------不拷贝records属性   pageInfo--->dishDtoPage
        BeanUtils.copyProperties(pageInfo, dishDtoPage, "records");

        List<Dish> records = pageInfo.getRecords();

        List<DishDto> list = records.stream().map((item) -> {

            DishDto dishDto = new DishDto();
            BeanUtils.copyProperties(item, dishDto);

            Long categoryId = item.getCategoryId(); //获取分类id
            //根据分类id查询分类对象
            Category category = categoryService.getById(categoryId);
            //设置条件,增强代码健壮性
            if (category != null) {
                dishDto.setCategoryName(category.getName());
            }

            return dishDto;
        }).collect(Collectors.toList());

        dishDtoPage.setRecords(list); //拷贝records

        return R.success(dishDtoPage);
    }

    /**
     * 根据id查询菜品信息和对应的口味信息
     *
     * @param id
     * @return
     */
    @GetMapping("/{id}")
    public R<DishDto> get(@PathVariable Long id) {

        DishDto dishDto = dishService.getByIdWithFlavor(id);

        return R.success(dishDto);
    }


    /**
     * 修改菜品
     *
     * @param dishDto
     * @return
     */
    @PutMapping
    public R<String> update(@RequestBody DishDto dishDto) {
        log.info(dishDto.toString());

        dishService.updateWithFlavor(dishDto);

        //清理某个分类下面菜品的缓存数据
        String key = "dish_" + dishDto.getCategoryId() + "_1";
        redisTemplate.delete(key);

        return R.success("修改菜品成功");
    }


    /**
     * 根据条件查询对应的菜品数据
     *
     * @param dish
     * @return
     */
   /* @GetMapping("/list")
    public R<List<Dish>> list(Dish dish){
        //构造查询条件
        LambdaQueryWrapper<Dish> lqw = new LambdaQueryWrapper<>();
        lqw.eq(dish.getCategoryId()!=null,Dish::getCategoryId,dish.getCategoryId());
        //添加条件，查询状态为1 (起售状态)的菜品
        lqw.eq(Dish::getStatus,1);

        //添加排序条件
        lqw.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);
        //查询
        List<Dish> dishList = dishService.list(lqw);

        return R.success(dishList);
    }*/
    @GetMapping("/list")
    public R<List<DishDto>> list(Dish dish) {
        List<DishDto> dishDtoList = null;

        //动态构造key
        String key = "dish_" + dish.getCategoryId() + "_" + dish.getStatus();
        //从redis中获取缓存数据
        dishDtoList = (List<DishDto>) redisTemplate.opsForValue().get(key);
        if (dishDtoList != null) {
            //如果存在，直接返回，无需查询数据
            return R.success(dishDtoList);
        }

        //如果不存在，需要查询数据库，将查询到的菜品数据缓存到Redis
        //构造查询条件
        LambdaQueryWrapper<Dish> lqw = new LambdaQueryWrapper<>();
        lqw.eq(dish.getCategoryId() != null, Dish::getCategoryId, dish.getCategoryId());
        //添加条件，查询状态为1 (起售状态)的菜品
        lqw.eq(Dish::getStatus, 1);

        //添加排序条件
        lqw.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);
        //查询
        List<Dish> dishList = dishService.list(lqw);

        dishDtoList = dishList.stream().map((item) -> {
            DishDto dishDto = new DishDto();
            BeanUtils.copyProperties(item, dishDto);
            //获得分类id
            Long categoryId = item.getCategoryId();
            //根据分类id查询分类对象
            Category category = categoryService.getById(categoryId);

            if (category != null) {
                dishDto.setCategoryName(category.getName());
            }
            //当前菜品id
            Long dishId = item.getId();
            LambdaQueryWrapper<DishFlavor> lambdaQueryWrapper = new LambdaQueryWrapper<>();
            lambdaQueryWrapper.eq(DishFlavor::getDishId, dishId);
            List<DishFlavor> flavorList = dishFlavorService.list(lambdaQueryWrapper);
            dishDto.setFlavors(flavorList);
            return dishDto;
        }).collect(Collectors.toList());

        redisTemplate.opsForValue().set(key, dishDtoList, 60, TimeUnit.MINUTES);
        return R.success(dishDtoList);
    }


}
